Structural Upgrades & Strengthening

External post-tensioning systems utilize high strength prestressing cables, strands and steel bars, and are used to increase or restore load-carrying capacity to a variety of structures.

Strengthening Existing Structures with Post-Tensioning

STRUCTURAL TECHNOLOGIES offers the most strengthening solutions available under one roof. Our custom-designed products add or restore load-carrying capacity for the most complex infrastructure challenges. Our products are fully integrated with our extensive engineering support services. This powerful combination translates into highly engineered solutions for our customers—which include owners, builders, managers, and designers of non-residential infrastructure.

Leveraging post-tensioning’s high-strength properties and proven performance, STRUCTURAL TECHNOLOGIES has successfully incorporated VSL products into its strengthening-related products and systems including:


VSL®External Post-Tensioning Systems

External Post-Tensioning

STRUCTURAL TECHNOLOGIES’ external post-tensioning systems utilize high strength prestressing cables, strands and steel bars, and are used to increase or restore load-carrying capacity to a variety of structures. Our engineers help design these versatile systems to reduce tensile stresses, cracking and deflection. By creating uplift or offset deflections, significant load capacity increases can be achieved while also minimizing and controlling crack formation.

External P-T System Features:
  • Improves stress conditions
  • Effective against crack formation
  • Controls deflection
  • Improves the strength of the structural elements

Structural Technologies, LLC is the exclusive licensee of VSL® Post-Tensioning Systems in the United States. 

VSL® is the registered trademark of VSL International Ltd.

XPT™ Post-Tensioning System for Pipe Rehabilitation

XPT Post-Tensioning Systems for PipeThe XPT™ Post-Tensioning system is an engineered solution utilizing reinforcing wire installed circumferentially at the exterior of designated pipe segment(s). The XPT™ System is fully structural and provides strengthening to weakened or distressed pipelines or can be used to proactively renew exposed pipelines.

  • Installation can take place on in-service pipelines
  • Excellent for localized repairs
  • Minimal impact to operations
  • When performed in conjunction with pipe excavation, repairs of damaged concrete is accomplished simultaneously


State-of-the-Art Strengthening Products

STRUCTURAL TECHNOLOGIES’ proprietary products are used to increase the load-carrying capacity of reinforced concrete and other structure types, including masonry, timber and steel. These systems may be used alone, or in any combination - including other commercially available products to solve complex structural load requirement changes.


V-Wrap Carbon & Glass FRP Composite Systems

V-WrapSTRUCTURAL TECHNOLOGIES’ V-Wrap externally bonded FRP Systems utilize lightweight, high-strength carbon fibers bonded with adhesive resins. Our systems are used to increase or restore load-carrying capacity to a variety of structures. Low profile and flexible, FRP is ideal for applications with limited access, and/or complex geometries.

V-Wrap FRP Composite System Features:
  • High tensile strength
  • Lightweight
  • Corrosion resistant
  • Installs quickly with no heavy equipment required
  • Maintains shape and aesthetics of the structure

DUCON® Micro-Reinforced Concrete Systems

DUCONDUCON® is an innovative, high-performance system designed for extreme load resistance and energy absorption. DUCON® combines an infuseable ultra-high-performance grout with a densely layered MicroMat® steel reinforcement system.

Placement characteristics similar to concrete, combined with the ductility and energy absorption properties of steel, give DUCON® “moldable, steel-like” characteristics

DUCON® System Features:
  • Very high flexural, shear, and compressive strengths
  • Extremely high energy absorption characteristics
  • Ductility characteristics similar to steel
DUCON® and MicroMat® trade names and patents are owned by DUCON GmbH and are distributed exclusively in North America by STRUCTURAL TECHNOLOGIES for strengthening and force protection applications.

Tstrata Enlargement Systems

Tstrat Enlargement Sysytems™STRUCTURAL TECHNOLOGIES’ Tstrata Enlargement Systems bond additional reinforced concrete to existing structures. Our systems are used to increase or restore load-carrying capacity to a variety of structures. Customized for every application, enlargement and overlay systems are ideal for situations that require improved strength and stiffness.

Tstrata Enlargement System Features:
  • Pressurized forming systems for enhanced bond that ensures that the structure and enlargement acts as a single composite in order to achieve design strength capacity
  • Different strengthening levels achieved by changing amount/layout of additional steel
  • Improves the stiffness of the structural elements
  • Controls deflection
  • Produces fire proofed solution
To learn more about these products and systems, visit




STRUCTURAL TECHNOLOGIES, a Structural Group company, is the exclusive designer and manufacturer of VSL post-tensioning and  construction systems in the United States. VSL systems have a well-earned reputation for their quality, reliability, and durability - and have been used throughout the world since 1956 to build, repair, and strengthen bridges, buildings, tanks, and special structures. For information on VSL products outside of the United States, visit the VSL International website

With companies dating back to 1902, Structural Group is firmly committed to its ongoing mission of making new and existing structures stronger and last longer. Through its companies, Structural Group delivers turnkey solutions that integrate technology, engineering, and construction. Structural Group provides specialty contracting services through our construction companies and state-of-the-art proprietary products and engineering support services through STRUCTURAL TECHNOLOGIES.

Learn more about Structural Group and its member companies.

VSL is the registered trademark of VSL International Ltd.